Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means that too much air is going into the engine on one side. It's like if you were blowing too hard into a balloon and it got too big too fast.
The P2448 code indicates that the secondary air injection system is detecting more air flow than expected in Bank 1 of the engine.
The secondary air injection system is designed to reduce emissions by injecting fresh air into the exhaust stream to help burn off excess fuel. The system uses an air pump and valves to control the flow of air. When the control module detects an air flow rate that is higher than the predetermined threshold, it triggers the P2448 code.
• Check Engine Light is on
• Poor engine performance
• Increased emissions
• Faulty air injection pump
• Blocked or leaking air injection hose
• Faulty air injection control valve
Air Injection System: A system that injects fresh air into the exhaust stream to help reduce emissions.
Bank 1: The side of the engine that contains cylinder number one.
• Check for diagnostic trouble codes and freeze frame data.
• Inspect the air injection pump and hoses for damage or leaks.
• Test the air injection control valve for proper operation.
• Replace the faulty air injection pump.
• Repair or replace damaged hoses.
• Replace the faulty air injection control valve.
• OBD-II scanner
• Multimeter
• Vacuum pump
$200 - $600
Moderate
• Toyota Tundra
• Lexus GX470
• Toyota Sequoia
• Regular maintenance of the air injection system.
• Ensure hoses and valves are free from debris.
• Check for leaks periodically.
Engine Performance
• Do not ignore the Check Engine Light.
• Have the vehicle inspected by a professional.
• Avoid driving the vehicle if performance issues are severe.
Check with your vehicle manufacturer for specific warranty coverage related to emissions components.
The P2448 code has been more common in vehicles with aging air injection systems, particularly in certain Toyota and Lexus models.
Moderate – Should be addressed to prevent increased emissions and potential engine performance issues.
Driving with a faulty air injection system may result in higher emissions, which can be against local environmental regulations.
• Engine at operating temperature
• Vehicle in idle or low-speed operation
The air injection pump and control valve are typically located near the front of the engine, often on the passenger side.
Q: Can I drive with a P2448 code?
A: While you can drive with this code, it is not recommended as it can lead to increased emissions and potential engine performance issues.
Q: How can I reset the P2448 code?
A: The code can be reset with an OBD-II scanner, but it's important to fix the underlying issue first to prevent the code from returning.
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Fitment Required · Vehicle-fitment part
Relevant for airflow, fuel-trim, and intake-metering faults after confirming the sensor is actually at fault.
Airflow and fuel-trim codes can involve the mass air flow sensor after proper diagnosis.
Verify the sensor design and fitment for your exact vehicle.
View options on AmazonThese parts may be related to this fault category, but a code by itself does not confirm exact fitment or guarantee that replacing a part will solve the problem.